You should know that currently the price of bitcoin is rising drastically, that's why it's possible that the transaction network in bitcoin is very full and maybe transaction fees also suddenly become expensive, as far as I know they will make transactions simultaneously to other withdrawal addresses into one transaction, that's why they processing it until the network is really not too full and costs much less.
I once also withdrew more than 24 hours after TheQuin explained to me to know that they process it in stages because maybe withdrawal requests are also very full plus the transaction network on the blockchain is quite full too, so being patient is the key to user trust in this site, believe me Their site has been trusted for years here, of course you won't lose your money.
I do agree that it is not going to be all that easy and we are going to end up waiting but on the plus side the price going up making us all more money. In fact, the idea is that, if you really want to feel awesome about it, because bitcoin prices are going up so much, we could technically say that your bitcoins that you want to withdraw from here, could worth more when they arrive your wallet than the time you clicked withdraw on the website.
This means that you receive more than you assumed you were going to get and you will be a little bit richer. That is of course just a silver lining, most people would prefer instantly, but that's just not possible with the way transaction fees are rising these days due to the price hike.